What is the purpose for piano?

The primary purpose of a piano is to produce musical sounds through the interaction of its keys, hammers, strings, and soundboard. When a key is pressed, it activates a hammer that strikes a string, causing it to vibrate. This vibration is transferred to the soundboard, which amplifies and projects the sound into the surrounding environment. Pianos are widely used as solo instruments, for accompanying other instruments, in ensembles, and as learning tools for music education.